The rear pinion seal on my 03 f150 is leaking, how hard is it to replace,
and what kinda tools do I need? O
thanks

 

Mark the rear driveshaft (paint or what ever) so you put it back in exactly the same place. Remove the rear driveshaft, remove the pinion nut, remove the driveshaft yolk, inspect yolk for a groove where the seal rides in it, replace yolk if needed, remove pinion seal, put some vasoline or other light (white) grease on the inside of the new seal, install new seal, install yolk, torque pinion nut to correct specs ( should use new pinion nut) reinstall rear driveshaft. you're done.